ykLiv

The Penguin should NEVER be allowed again. Danny did a fantastic job portraying the Penguin. Same goes for Catwoman... even though she wouldn't be a MAIN villain it would suck if somebody else *cough* Hallie Berry *cough*

I'd say...

Mr. Freeze. From the currently technology it's time Mr. Freeze finally got a shot.

The Super Pimp of GF

hmmm I would say maybe multiple smaller villains and one big villain:
small villains: Killer croc and maybe scarecrow again
Main villain: Riddler? or maybe bane (not the stupid bane they had in batman and robin the normal bane) or maybe poision ivy or hugo strange lol

blue 3

No way. NO NO NO NO. NO Mr. Freeze, I'm sorry. They have done an outstanding job of selecting villans that portrayed violence and psychological damage. Villans like Mr. Freeze, Bane and Poison Ivy have been absolutely destroyed by the old movies. The only villan that had any tiny spot of true psychological effect was the Riddler. I want to continue seeing the darker side of gotham, not just the mob side where crap blows up.

They could pull it off, I have no doubt, but I want to see a Riddle above a Bane or Mr. Freeze. Riddler and Joker and even Scarecrow are so much more believable. The entire effort of these movies was to make Batman more realsitic. They'll lose that touch horribly with some of these other bad guys.

Studley-Do-Right

As I was looking at some of the Batman villains, one that stood out that might be able to work is Black_Mask. It doesn't seem too out there, and it could show the power swinging back to the mob. I think they could possibly incorporate Cat Woman into there, and make her true to the comic version, in that she switches sides based on what benefits her most.

The Riddler would work with the more realistic feel, but he seems too 'tame' compared to the crazy ruthlessness that is the Joker and even the Scarecrow.

Alfred :: Gotham Hero

i agree. think they should leave the joker alone, perhaps portrey him to be in prison or something, and focus on someone like two face, the scarecrow, or the riddler. i would choose the riddler because we havent seen him at all in the first 2 movies.

Likes snow

I think the Riddler probably has the best chance of following up well after the joker. He just seems the most likely to be able to orchestrate mass destruction. Kind of as a foil to the Joker's anarchic methods, it'd be meticulously detailed and planed out.